CVE-2026-64298: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-mj8v-3x8m-9rx7
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CVSS 7.1
CWE-862
Published
Advisory Summary

CVE-2026-64298 is a HIGH (CVSS 7.1) security vulnerability vulnerability (CWE-862: Missing Authorization) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not perform an authorization check when an actor attempts to access a resource or perform an action.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64298 at a Glance

CVE Identifier CVE-2026-64298
GHSA Identifier GHSA-mj8v-3x8m-9rx7
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-862: Missing Authorization
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-64298

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-64298, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In the Linux kernel, the following vulnerability has been resolved: NFSv4: include MAY_WRITE in open permission mask for O_TRUNC POSIX requires write permission to truncate a file, so an open() that specifies O_TRUNC must be authorized for write access regardless of the O_ACCMODE access mode. nfs_open_permission_mask() builds the access mask passed to nfs_may_open(), which is the local authorization gate for OPENs the client serves itself from a cached write delegation via the can_open_delegated() path in nfs4_try_open_cached(). The mask is derived from O_ACCMODE alone, so an open(O_RDONLY | O_TRUNC) against a file the caller cannot write requests only MAY_READ and passes the local check. The OPEN is then satisfied locally and the truncation is issued to the server as a SETATTR(size=0) over the delegation stateid, which the server accepts under standard write-delegation semantics. POSIX requires that this open fail with EACCES. Include MAY_WRITE in the mask whenever O_TRUNC is set so the local check matches the access the server would have enforced.

References

NVD — CVE-2026-64298 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64298
git.kernel.org/stable/c/22c1fd1355... WEB
https://git.kernel.org/stable/c/22c1fd1355ad4ca27aa7f0fa02719122dd92d9de
git.kernel.org/stable/c/30fdf4df6c... WEB
https://git.kernel.org/stable/c/30fdf4df6c3c00efec947e4ddf97f0fdd4473628
git.kernel.org/stable/c/4817c89743... WEB
https://git.kernel.org/stable/c/4817c8974315b666e895b7d1bb83cd3664c323b1
git.kernel.org/stable/c/5140f099ec... WEB
https://git.kernel.org/stable/c/5140f099ecd8a2f2808b7f7b720ee1bad8468974
git.kernel.org/stable/c/6bd7d0a06b... WEB
https://git.kernel.org/stable/c/6bd7d0a06b53c4e797e1a9cea0d2d41aa1b26230
git.kernel.org/stable/c/a937e92c1d... WEB
https://git.kernel.org/stable/c/a937e92c1d00534b5c2e3e9f4381b7e988180797
git.kernel.org/stable/c/cb148a2762... WEB
https://git.kernel.org/stable/c/cb148a2762d644bff1894728e8835a9a4b84f9ea
git.kernel.org/stable/c/e36501b7d4... WEB
https://git.kernel.org/stable/c/e36501b7d4abdcd6d69a7cb901b2f286b7a3d041

Frequently Asked Questions

What is CVE-2026-64298?
CVE-2026-64298 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-862: Missing Authorization.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-64298?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64298?
CVE-2026-64298 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
What CWE is associated with CVE-2026-64298?
CVE-2026-64298 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Maven dependencies for CVE-2026-64298?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mj8v-3x8m-9rx7",
  "modified" : "2026-07-27T06:30:31Z",
  "published" : "2026-07-25T12:31:30Z",
  "aliases" : [ "CVE-2026-64298" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSv4: include MAY_WRITE in open permission mask for O_TRUNC\n\nPOSIX requires write permission to truncate a file, so an open() that\nspecifies O_TRUNC must be authorized for write access regardless of the\nO_ACCMODE access mode.\n\nnfs_open_permission_mask() builds the access mask passed to\nnfs_may_open(), which is the local authorization gate for OPENs the\nclient serves itself from a cached write delegation via the\ncan_open_delegated() path in nfs4_try_open_cached().  The mask is\nderived from O_ACCMODE alone, so an open(O_RDONLY | O_TRUNC) against a\nfile the caller cannot write requests only MAY_READ and passes the\nlocal check.  The OPEN is then satisfied locally and the truncation is\nissued to the server as a SETATTR(size=0) over the delegation stateid,\nwhich the server accepts under standard write-delegation semantics.\nPOSIX requires that this open fail with EACCES.\n\nInclude MAY_WRITE in the mask whenever O_TRUNC is set so the local\ncheck matches the access the server would have enforced.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64298"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/22c1fd1355ad4ca27aa7f0fa02719122dd92d9de"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/30fdf4df6c3c00efec947e4ddf97f0fdd4473628"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4817c8974315b666e895b7d1bb83cd3664c323b1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5140f099ecd8a2f2808b7f7b720ee1bad8468974"
  }, {
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    "url" : "https://git.kernel.org/stable/c/6bd7d0a06b53c4e797e1a9cea0d2d41aa1b26230"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a937e92c1d00534b5c2e3e9f4381b7e988180797"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cb148a2762d644bff1894728e8835a9a4b84f9ea"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e36501b7d4abdcd6d69a7cb901b2f286b7a3d041"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:10Z"
  }
}